1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbf0d16ae0e00bac2e68182def976214677372388debf3646a2ca38495f35fb. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/736b1130-7868-471f-b2c3-50a629ee1b91.json and https://artists.proofprofile.net/proofs/artist/736b1130-7868-471f-b2c3-50a629ee1b91.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
5 Lieder, Op. 49: No. 4, Wiegenlied (Arr. P. Nagy for Piano)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d85f6e3eaeb87520b23f5d8663cff14764f9493827cf6a3f4e8e6f67f91265a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199295502.
A Guided Tour of the Romantic Era, Vol. 10
A Guided Tour of Nationalism in the Romantic Era, Vol. 7
Slavonic Dances, Series 2, Op. 72, B. 147: 16 Slavonic Dances: No. 10 in E Minor, Op. 72, No. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9171c45280347e2f0f4590eb0f8748805c2128f2d0a8dbf39aaefc806a0fe28b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199244110.
A Guided Tour of the Romantic Era, Vol. 12
Toy Symphony: And Other Fun Classical Favourites
Music for the Royal Fireworks, HWV 351: IV. La Rejouissance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd33db83325dc8924171c4a5cadf190efbc7346475e043d8dd08f625cba8fee. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190516621.
Cassation in G Major "Toy Symphony": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb73e670306d0608521e4a6033b22df5779ccb6a7c7ad84e2e412eface10be6c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190813405.
The Four Seasons: Violin Concerto in G Minor, Op. 8, No. 2, RV 315, "L'estate" (Summer): I. Allegro non molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea464b20c2b74eff1b3b0b7327d81bfb8d29619657841b8cfbe16ed9e5c005f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190622804.
Takako Nishizaki Plays Suzuki Evergreens, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d42b09f0faf0cf638d9be8bcd1db7a2b4ab5ea513b3d15bdefb6019a7cfe40. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190923302.
Song of the Wind (Arr. for Violin & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a932576ea13a55db7a6cadc6a94ad7425dbe8981e2422cac25e91a1776e4feb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190923303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a01d36eb270e0a650eeb2abe4e4fa6762e5090607bf2f7aae536a2877d5a349. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190923306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975477dbc64148d19aabb3281888ce57c34a993dfa4bb0f73083d4a3d6403394. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190923310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63deddbed881cf22190f4d83992d1e6160f0ac721b764a5d232b6ba19ef9e380. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190923312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815755fb57da562201ec35401a10f01c7d178c701ac76fecf13bef1b26c78d09. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190923313.
Suite in G Minor, BWV 822: No. 7, Menuet III (Arr. for Violin & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d698ef207d63610fdc31be3ac9dbce03b1449b63499e0cdbca69e44d53a6f2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190923314.
Minuet in G Major, BWV Anh. 114 (Attrib. J. S. Bach) [Arr. for Violin & Piano]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1690b2a1d4c7eb4b91c1febb25dde2ce470204e2ba39c7cfedd738ab48580be6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190923318.
Album für die Jugend, Op. 68: No. 10, Fröhlicher Landmann, von der Arbeit zurückkehrend
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cf240acab21f230da8e10c38a54d36f5f36c68547713b679a0c63c72414e6b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190923321.
Judas Maccabaeus, HWV 63: See, the Conqu'ring Hero Comes (Arr. for Violin & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5112bdf475c1e6dba916e6f9885aba96bd6651eaa6478afd6771e164719486. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190923323.
Mignon: Me voici dans son boudoir (Arr. for Violin & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844f11fdeeccc74151785df65c6ad8fc56459f49ef6d1f3c2a9aaef7ba1c6ed5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190923336.
Pièces de viole: No. 24, Rondeau (Attrib. Jean-Baptiste Lully) [Arr. for Violin & Piano]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1431f78f9d22afd020b9a0a6d0f6e407785d531566dc46d45c23f8e287450646. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190923337.
Klebe: Violin Sonatas / Capriccio for Solo Violin, Op. 128 / Fantasia Incisiana, Op. 137
KLEBE: Poema drammatico / Widmungen / Zornige Lieder ohne Worte
Klebe: Glockenturme / Wiegenlieder / Feuersturz / Sonata, Op. 4
Variations In E Flat Major On A Theme By Schumann, Op. 23: Variation 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69048697dbb9a3c1377aa9d85a243bb340f66fd671f13e0000744107174edbab. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199624301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ed5e0e4bd96cc895db66bee24a59ef773b9857e0cffd14112edf9c76a578b7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199624312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7858633e512841e91a08a70cc203a77b5420cadf8b7041e5edae529d6120f4ef. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199624313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3901f7ee9c1874d413b264db74d3fa8a5bb78432f7b7d61e96ac2a6fb20a15ed. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199624315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a63bfa24e120f083f60dd9ebe7c106fc9387e8e013b8662a480212d28a5286. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199624326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d70ede3ec85ff439ea41408099181122dfbbbc098e2a7ee460a766ca856435a. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199624314.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Souvenir De La Russe, Anh. IV/6: Die Nachtigall (The Nightingale)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6b2b9ffd47069d66d30f11cff442ddb839855e70e8f62939be780568762115. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199624331.